Alarm system.



W. J. ST. ONGE.

ALARM SYSTEM.

APPLII'JATION FILED JULY 5, 1910.

Patented Nov. 8, 1910.

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- WA,L '1ER J. ST. ONGE, or LYnrmoHIo, ASSIGNOR TO THE DEANELECTRICICOMPANY, or ELYRIA, 01110, A CORPORATION or OHIO.

ALARM SYSTEM.

T all whom it may concern.

- Be it known that I, ALTERJ Ta ST. Owen,

' a citizen of the United States, residing in Elyria, in the county ofLorain and State of Ohio, have invented certain new and usefulImprovements in Alarm Systems; and I do hereby declare the following tobe a full, clear, and exact description of the. invention, such as willenable others skilled in the art to which it appertains to make and usethe same.

My invention relates to alarm systemsv and is more especially directedat means for controlling the same. In such systems as fire alarm,watchmen and similar systems, it is common toemploy a box at thesubstations where a key is mounted behind seine fragile substance, suchas glass, a glass plate for example. This key can be reached by crushingthe fragile plate. It is then removed and the box unlocked, opened andthe firealarm signal sent in. The fragile plate is often used to controla circuit employed in connection with the system; sometimes the maincircuit itself. There may be a switch in the circuit which is'restrainedby the plate from operating to open or close the circuit to complete thedesired connect-ions or cause other changes as required. In order torelease the switch it is necessary to crush the part of the platerestraining the same. The

idea, being that this portion of the plate will be crushed when the partinclosing the key is broken for the purpose of removing the key. Assometimes happens only that portion of the plate proximate to the key iscrushed, the key being removed leaving the switch or other circuitcontrolling means in its normal position. I have devised means toprevent this, associating the key with the circuit controller in such aWay that it cannot be removed without crushing that part v ofthe platewhichrestrains the circuit controller, thus releasing the same.

My invention will be best understood by reference to the followingdescription when taken in connection with the following illustrationsshowing specific embodiments there of, while the scope will be moreparticularly pointed out in the appended claims.

Figure l is a front view of the device. Fig. 2 is a horizontalcross-section taken above the key showing the circuit controller and adiagram of circuit connections con- 7 Specification of Letters Patent.

Patented Nov. s, 1910.

Application filed July 5, 1910. Serial No. 570,301.

I trolled thereby. Fig. 3 is afront view of a modified form.

Referringnow to Figs. 1 and 2: At 1, I show a P0111011 of thebox, at 2an escutch! eon plate, at at a glassplate held between.

the box 1 and the escutcheon plate The portion 1 and the plate 4 formthe walls of the inclosure A. A hollow stud 3, is mounted in the backwall of this space and extends near to the rear surface of the plate I.A button is mounted to reciprocate in this: hollow stud.

At 6 I Show akey, the eye ofwhicla fits. over the stud 3, so that-thekey is loosely attached or hung thereto.

At. 7 and 8 I show the contact springs of: an electric switch. Thespring'8 isconnect? ed by an insulating stud 11' to a long spring 9,which engages the 1 button 5, tending; always to press it toward theglass 4,'whichf acts as a restraint thereupon. hen the glass is broken,this spring pushes the button forward until the spring 9 engages afourth spring contact 10. which is spaced from the back of theinclosurebyan insulating stud 12. The other ends of the springs. areseparated from each other by insulating members 13. The springs 9 and 10are connected in a circuit 1617 with a lamp 15 and a battery B. lVhentheglass is broken,

the switch 910 closes, completing a circuit through this lamp and thesame is lighted. The springs 7 and 8 are connected in a shunt 18-19 of aswitch 20-21 in the main circuit 2223. The switch 20-21 is adapted to beoperated by make and break wheel 2%, controlled through a lever, 25.Then the box is open, the lever 25 is depressed to send in the firealarm signal to the central station. Unless the switch 7'8 is opened,nosignal will be sent,'as the switch 20-21 will be shunted. Itthereforehappens, that when the key is removed and the signal sent in, unless theglass is broken to release the button 5, no signal. will be sentto thecentral station. By my arrangement it is impossible to remove the keywithout breaking the glass around the button.

In Fig. 3 I show a modification, the escutcheon plate being shown at102, the glass v for the purpose of clearly illustrating specificembodiments thereof.

button through this'ring. When the key is removed, the ring will breakthe glass around the button releasing the same.

I While I have shown these particular forms of my invention, it will beobvious to those skilled in the art, that numerous and ex tensivedepartures from the form and the details of the a paratus here shown maybe made Without eparting from the spirit of this invention, the samebeing shown herein 1. In a device of the class described, thecombination of an electric circuit, means for controlling said circuit,a key, an inclosure in which said-key is mounted, and means to cause theoperation of said circuit controlling means before said key can beremoved from the'inclosure.

2. In a device of the class described, the combination of an electriccircuit, means for controlling said circuit, a key, an inclosur'e inwhich said key is mounted, a fragile plate forming part of the inclosingwalls and means to cause the operation of said circuit controlling meansbefore said key,can be removed from said inclosure.

3. In a device of the class described, the combination of an electriccircuit, means for controlling said circuit, a fragile plate controllingsaid means, a key and an inclosure therefor,'-said key adapted to crushsaid plate when the key is removed from said inclo-- sure.

4. In a device of the class described, the

combination of an electric circuit, a switch I means mounted in said.inclosure controlling said switch spring, a spring pressin said meansagainst said plate, a key house in said inclosureadapted when removed tocause the crushing of said plate whereby said spring pressed means isreleased and said switch operated.

6. In a device of the class described, the

combination of an electric circuit, a switch in said circuit, aninclosure, a fragile plate mounted in the Walls of said lnclosure, a

button mounted insaid inclosure, a spring pressing said button againstsaid plate, and a key housed in sai inclosure, adapted when removed tocause the crushing of said cums plate, whereupon said button is releasedand said switch operated,

7. In a device of the class described, the

combination of an electric circuit, a switch therein, an inclosure, ahollow stud mounted in said inclosure, a button controlling said switchmounted to reciprocatein said stud, a fragile plate, said button beingspring pressed against said plate and a key loosely connected to saidstud, said key adapted to' cause the crushing of said plate when removedfrom said button, whereupon said spring pressed button is released andsaid switch operated.

8. In a device of the class described, the

combination .of an electric circuit, means controlling said circuit, afragile plate normally restraining the operation of said means, a keyand a ring attached to said key and said means, said key and ringadapted to crush said plate to permit the operationof said circuitcontrolling means when the key is removed thereupon.

9. In a device of the class described, the combination of an inclosure,an electric circuit, normallylrestrained circuit controlling meansmounted in said inclosure a key associated with said circuit controllingmeans and means to prevent the removal of said key until said circuitcontrolling means is released.

l0. Ina device of the class described,-the combination of an electriccircuit, normally restrained circuit controlling means,'a key associatedtherewith, and means to prevent the removal of said key therefrom untilsaid circuit controlling means is released.

11. Ina device as described, the combination of an electric circuit, aswitchtherein, means normally restraining said switch, a key associatedwith'said switch, said restraining means adapted to release said switchwhen said key is removed.

12. In adevice as described, the combination of an electric circuit, aswitch, therein, a fragile plate normally restraining said switch, a keyassociated with said switch, said plate adapted to release said switchwhen said key is removed.

13. In a deviceof the class described, the

combination of an electric circuit, a switch therein, a fragile platenormally restraining said switch, a key associated with said switch,said key when removed adapted'to cause the crushing ,of said plate,whereby said switch is released,

In testimony whereof, I afiix my signature in the presence of twowitnesses.

WALTER J. ST. ONGE.-

Witnesses:

T. K. DIEDRICK, F. 0. Brown.

